Alexandre Julliard : ntdll: Use a pthread mutex for the drive info section.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d7ef680e950431d868e6d52418513472af7edbb3
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=d7ef680e950431d868e6d52418513472af7edbb3

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Mon Jul 13 18:45:04 2020 +0200

ntdll: Use a pthread mutex for the drive info section.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntdll/unix/file.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/dlls/ntdll/unix/file.c b/dlls/ntdll/unix/file.c
index c5ffd0166d..c90fac156a 100644
--- a/dlls/ntdll/unix/file.c
+++ b/dlls/ntdll/unix/file.c
@@ -1871,13 +1871,14 @@ static NTSTATUS server_get_file_info( HANDLE handle, IO_STATUS_BLOCK *io, void *
 /* retrieve device/inode number for all the drives */
 static unsigned int get_drives_info( struct file_identity info[MAX_DOS_DRIVES] )
 {
+    static pthread_mutex_t cache_mutex = PTHREAD_MUTEX_INITIALIZER;
     static struct file_identity cache[MAX_DOS_DRIVES];
     static time_t last_update;
     static unsigned int nb_drives;
     unsigned int ret;
     time_t now = time(NULL);
 
-    RtlEnterCriticalSection( &dir_section );
+    pthread_mutex_lock( &cache_mutex );
     if (now != last_update)
     {
         char *buffer, *p;
@@ -1912,7 +1913,7 @@ static unsigned int get_drives_info( struct file_identity info[MAX_DOS_DRIVES] )
     }
     memcpy( info, cache, sizeof(cache) );
     ret = nb_drives;
-    RtlLeaveCriticalSection( &dir_section );
+    pthread_mutex_unlock( &cache_mutex );
     return ret;
 }